remove deprecated functions, fix typo and style

variants/lilygo_techo_card/TechoCardBoard.cpp

@@ -22,7 +22,7 @@ void TechoCardBoard::begin() {
     NRF52BoardDCDC::begin();
     Wire.begin();
 
-    for (uint8_t i = 0; i < sizeof(Led) / sizeof(*Led); i++)
+    for (uint8_t i = 0; i < sizeof(Led) / sizeof(Led[0]); i++)
     {
         Led[i]->begin();
         delay(3); // allow the LEDs to initialise, otherwise they can get stuck
@@ -88,7 +88,7 @@ void TechoCardBoard::turnOffLeds() {
 }
 
 void TechoCardBoard::powerOff() {
-  nrf_gpio_cfg_sense_input(BUTTON_PIN, NRF_GPIO_PIN_PULLUP, NRF_GPIO_PIN_SENSE_LOW);\
+  nrf_gpio_cfg_sense_input(BUTTON_PIN, NRF_GPIO_PIN_PULLUP, NRF_GPIO_PIN_SENSE_LOW);
   turnOffLeds();
   digitalWrite(PIN_PWR_EN, LOW);
   sd_power_system_off();

variants/lilygo_techo_card/target.cpp

@@ -32,24 +32,7 @@ bool radio_init() {
   return radio.std_init(&SPI);
 }
 
-uint32_t radio_get_rng_seed() {
-  return radio.random(0x7FFFFFFF);
-}
-
-void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
-  radio.setFrequency(freq);
-  radio.setSpreadingFactor(sf);
-  radio.setBandwidth(bw);
-  radio.setCodingRate(cr);
-}
-
-void radio_set_tx_power(int8_t dbm) {
-  radio.setOutputPower(dbm);
-}
-
 mesh::LocalIdentity radio_new_identity() {
   RadioNoiseListener rng(radio);
   return mesh::LocalIdentity(&rng);  // create new random identity
 }
-
-

variants/lilygo_techo_card/target.h

@@ -26,8 +26,4 @@ extern EnvironmentSensorManager sensors;
 #endif
 
 bool radio_init();
-uint32_t radio_get_rng_seed();
-void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
-